Rating: 2 / 5
Great concept (that's why it gets 2 and not a 1), but why does it weigh 1 lb 4oz!? That's more than their summer sleeping bags. What size pad is it designed for? Since it tapers from about 30" near the head to around 26" near the calf it doesn't hold two 20" pads close together. The product could be vastly improved, but the concept is really great.
Don't know why two zippers are necessary with this or with their semi-rectanular bags either, since it seems most semi-rectangular bag users would use as quilt with coupler more often than mating to a mummy.